Key construction and support for telephonic apparatus.



1 V W. P. ANDRIOK, E. LOWE & H. W. HAFF. KEY GON STEUGTION AND SUPPORT FORTELEPHONIO APPARATUS.

APPLICATION FILED MAR. 13, 1911.

' Patented May 6, 1913 Ill! Z W m ATTORNEY W. P.- ANDRIOK, E. LOWE & H. W. HAPF. KEY CONSTRUCTION AND SUPPORT FOR TBLEPHONIG APPARATUS.

APPLIGATION FILED MAR.13, 1911.

Patented May 6, 1913.

2 SHEETSr-SHBET 2.

emma ATTORNEY WITNESSES Q. QX/ 4W2? UNITED STATES PATENT OFFICE.

WALLACE PIAU ANDRICK, EDGAR 'LowE, AND HOWELL w. HAFF, 0F JAMAICA, NEW YORK, ASSIGNOBS T0 KELLEY MONROE TURNER, 0F JAMAICA, NEW YORK.

Specification of Letters Patent.

Patented May 6, 1 913 Application filed March 13, 1911. Serial No. 614,047.

To all whom it may concern:

'Be it known that we, WALLACE PFAU AN- DRICK, EDGAR Lowe, and HOWELL W. HAFF, citizens of the United States, residing at 6 Jamaica, in the county of Queens and State of New York, have invented a new and useful Improvement in Key Construction and Supports for Telephonic Apparatus, of which the following is a specification.

This invention relates to a key construction and support for telephonic apparatus, and particularly to the type of telephone transmitting station set forth in the pending application of Percival Burgess, Serial No. 584,414, and in pending application for design patent Serial No. 612,712, filed March 6th, 1911.

I The object of the invention is primarily to obtain an escutcheon face key board with keys in a horizontal row or line across the face thereof, and spring blades supported by the same unitary part that constitutes the escutcheon front, this unitary partbeing formed in such 'away as to adapt itself to the purpose of holding the spring blades, supporting the various pivot axes of the keys, serving the purposes of the escutcheon front, accommodating the requisite movement of the keys, properly separating the 30 keys from one anotherand giving their support adequate rigidity in all directions, and which is compact, ornamental, easily constructed-and durable.

With the foregoing in view, the invention. consists in the improved key construction and support as hereinafter set forth.

In the drawings, Figure 1, is a sideelevation of a key construction and support embodying the principles of our invention; Fig.

2, is a similar view showing a depressed posi- "tion of the key; Fig. 3, is a top plan view; Fig. 1, is a perspective view of the frame; Fig. 5, is a front View showing the key construction and support embodied in an instrument.

The invention will include a unitary frame as 1, which permits requisite movement of the keys and establishes a support therefor, and which further constitutes a support for the spring blades 2. i

In the best constructions embodying the .inventio'n there will be provided a plate of sheet metal bent into a channel or U shape 3. with one side or leg 4 standing vertical '55 and the other side or leg 5 bent into a horizontal plane at a distance considerably below flattened face 6 along the corner. and on the upper side and which maybe made more defined by facing off the corner as clearly shown in Fig. 4. Bent as above the plate has a shape adapted to the purposes already mentioned, and in order to give it a high degree of rigidity and serve certain other functions later described there are formed ears 7 projecting upward from the bottom of the channel 3, these ears being of rectangular form so as to fit the channel and extend above the plane of the horizontal ledge 5. v As shown in Fig. 3, the ears 7 are-punched out of the bottom of the channel 3 and bent upward vertically and parallelv withQone another.

8 denotes lugs or ears formed or bent on the ends of the vertical walls and in alinement with the upper portions of the ears 7. l

' 10 indicates a series of ,holes drilled through the lugs 8 and ears 7 in alinement,

and adapted to receive a fixed spindle 11 constituting a pivot axis or journal support for the various keys 12.

The keys 12 are of the ordinary form having fiat side faces and handles 13, and the keys are closely constrained in rectangular openings 14 on the front wall 4, the open ings being of such a size as to permit the cylindrical portions 15 of the keys to partly protrude therethrough. 16 denotes, limits or stops on the keys which prevent too great a movement in any'idirect'ion. 17 is a cam roller or rollers supported back of the axis 11. These features are the ordinary construction of keys.

The spring blades are also of the ordinary form having contacts 19, an inclined tip 20 for engagement with the cam rollers 17, and an insulating spacing block 21 through which the clamping screws 22 pass downward. The screws are received inthe upper fiat face of .the ledge 5 which constitutes the support for the spring blades and on which all of the groups of spring blades are adapted to be screwed as clearly shown in Fig. 3,

View a channel 25 may be faced in the front of the Wall 4 which has the effect of defining the apparent support for the keys; from the wall or face above' While We have provided 5 this simple means of furnishing the ornaposes of ornament instead of being itself oxidized or enameled.

What We claim'is I 1. A key construction 'and support com- ,prisingca one piece frame formed of sheet metal having a vertical front Walland a horizontal'rear ledge joined by a channel form, keys supported behind and protruding through said wall and projecting downward partly into saidchannel, and groups .of

spring hlades'screwed to the upper surface of said ledge and cooperating with the respective keys.

2. A key construction and support com-- prising a one piece frame of channel form blades supported by said having a- Vertical frontwall and a rearwardly extending ledge and having ears bent up from the bottom of the channel and lugs bentoVer from the ends of said front Wall, a spindle passed through said ears and lugs behind said wall, keys supported by said spindle and protruding through said wall and extending down into said channel below said ledge, and groups of spring ledge and adapted to be engaged by said keys, said front Wall constituting an escutcheon front, substantially as described.

In testimony whereof, We have signed our names to this specification in the presence of two subscribing witnesses, this seventh day of March, 1911.

\VALLACE PFAU ANDRICK. EDGAR LOVE. HOYVELL \V. I-IAFF.

lVitnesses EDNA TAYLOR,

W. G. WHYMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! f ats-11 .5;

Washington, D. C. 

